<?php
class kp_zip {
	// 解压
	public static function unzip($zipFile, $toDir) {
		$unzip = new php_unzip();
		foreach($unzip->ReadFile($zipFile) as $row) {
			$file = $toDir.'/'.$row['Path'].'/'.$row['Name'];
			$parentDir = dirname($file);
			!is_dir($parentDir) && mkdir($parentDir, 0777, TRUE);
			if(file_put_contents($file, $row['Data']) !== FALSE) {
				touch($file, $row['Time'], $row['Time']);
			}
		}
		return TRUE;
	}

	// 压缩  $filePath 目录或文件
	public static function zip($filePath, $zipFile) {
		$zip = new php_zip();
		if(is_dir($filePath)) {
			$zip->addDir($filePath);
		}else{
			$zip->addFile(file_get_contents($filePath), basename($filePath), filemtime($filePath));
		}
		return file_put_contents($zipFile, $zip->file());
	}
}

class php_zip {
	var $datasec      = array();
	var $ctrl_dir     = array();
	var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00";
	var $old_offset   = 0;

	function unix2DosTime($unixtime = 0) {
		$timearray = ($unixtime == 0) ? getdate() : getdate($unixtime);

		if($timearray['year'] < 1980) {
			$timearray['year']    = 1980;
			$timearray['mon']     = 1;
			$timearray['mday']    = 1;
			$timearray['hours']   = 0;
			$timearray['minutes'] = 0;
			$timearray['seconds'] = 0;
		}

		return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) |
				($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1);
	}

	function addDir($dir) {
		static $rootDir;

		if(empty($rootDir)) $rootDir = $dir.'/';
		$dh = opendir($dir);
		while(($file = readdir($dh)) !== FALSE) {
			if($file == '.' || $file == '..') continue;
			$fullpath = $dir.'/'.$file;
			if(is_dir($fullpath)) {
				$this->addDir($fullpath);
			}else{
				$this->addFile(file_get_contents($fullpath), str_replace($rootDir, '', $fullpath), filemtime($fullpath));
			}
		}
		closedir($dh);
	}

	function addFile($data, $name, $time = 0) {
		$name     = str_replace('\\', '/', $name);

		$dtime    = dechex($this->unix2DosTime($time));
		$hexdtime = '\x' . $dtime[6] . $dtime[7]
				  . '\x' . $dtime[4] . $dtime[5]
				  . '\x' . $dtime[2] . $dtime[3]
				  . '\x' . $dtime[0] . $dtime[1];
		eval('$hexdtime = "' . $hexdtime . '";');

		$fr   = "\x50\x4b\x03\x04";
		$fr   .= "\x14\x00";
		$fr   .= "\x00\x00";
		$fr   .= "\x08\x00";
		$fr   .= $hexdtime;

		$unc_len = strlen($data);
		$crc     = crc32($data);
		$zdata   = gzcompress($data);
		$zdata   = substr(substr($zdata, 0, strlen($zdata) - 4), 2);
		$c_len   = strlen($zdata);
		$fr      .= pack('V', $crc);
		$fr      .= pack('V', $c_len);
		$fr      .= pack('V', $unc_len);
		$fr      .= pack('v', strlen($name));
		$fr      .= pack('v', 0);
		$fr      .= $name;

		$fr .= $zdata;

		$this -> datasec[] = $fr;

		$cdrec = "\x50\x4b\x01\x02";
		$cdrec .= "\x00\x00";
		$cdrec .= "\x14\x00";
		$cdrec .= "\x00\x00";
		$cdrec .= "\x08\x00";
		$cdrec .= $hexdtime;
		$cdrec .= pack('V', $crc);
		$cdrec .= pack('V', $c_len);
		$cdrec .= pack('V', $unc_len);
		$cdrec .= pack('v', strlen($name) );
		$cdrec .= pack('v', 0 );
		$cdrec .= pack('v', 0 );
		$cdrec .= pack('v', 0 );
		$cdrec .= pack('v', 0 );
		$cdrec .= pack('V', 32 );

		$cdrec .= pack('V', $this -> old_offset );
		$this -> old_offset += strlen($fr);

		$cdrec .= $name;

		$this -> ctrl_dir[] = $cdrec;
	}

	function file() {
		$data    = implode('', $this -> datasec);
		$ctrldir = implode('', $this -> ctrl_dir);

		return
			$data .
			$ctrldir .
			$this -> eof_ctrl_dir .
			pack('v', sizeof($this -> ctrl_dir)) .
			pack('v', sizeof($this -> ctrl_dir)) .
			pack('V', strlen($ctrldir)) .
			pack('V', strlen($data)) .
			"\x00\x00";
	}
}

class php_unzip {
	var $Comment = '';
	var $Entries = array();
	var $Name = '';
	var $Size = 0;
	var $Time = 0;

	function Count() {
		return count($this->Entries);
	}

	function GetData($in_Index) {
		return $this->Entries[$in_Index]->Data;
	}

	function GetEntry($in_Index) {
		return $this->Entries[$in_Index];
	}

	function GetError($in_Index) {
		return $this->Entries[$in_Index]->Error;
	}

	function GetErrorMsg($in_Index) {
		return $this->Entries[$in_Index]->ErrorMsg;
	}

	function GetName($in_Index) {
		return $this->Entries[$in_Index]->Name;
	}

	function GetPath($in_Index) {
		return $this->Entries[$in_Index]->Path;
	}

	function GetTime($in_Index) {
		return $this->Entries[$in_Index]->Time;
	}

	function ReadFile($in_FileName) {
		$this->Entries = array();
		$this->Name = $in_FileName;
		$this->Time = filemtime($in_FileName);
		$this->Size = filesize($in_FileName);

		$oF = fopen($in_FileName, 'rb');
		$vZ = fread($oF, $this->Size);
		fclose($oF);

		$aE = explode("\x50\x4b\x05\x06", $vZ);

		$aP = unpack('x16/v1CL', $aE[1]);
		$this->Comment = substr($aE[1], 18, $aP['CL']);
		$this->Comment = strtr($this->Comment, array("\r\n" => "\n",
													 "\r"   => "\n"));

		$aE = explode("\x50\x4b\x01\x02", $vZ);
		$aE = explode("\x50\x4b\x03\x04", $aE[0]);
		array_shift($aE);

		foreach($aE as $vZ) {
			$aI = array();
			$aI['E']  = 0;
			$aI['EM'] = '';
			$aP = unpack('v1VN/v1GPF/v1CM/v1FT/v1FD/V1CRC/V1CS/V1UCS/v1FNL', $vZ);
			$bE = ($aP['GPF'] && 0x0001) ? TRUE : FALSE;
			$nF = $aP['FNL'];

			if($aP['GPF'] & 0x0008) {
				$aP1 = unpack('V1CRC/V1CS/V1UCS', substr($vZ, -12));

				$aP['CRC'] = $aP1['CRC'];
				$aP['CS']  = $aP1['CS'];
				$aP['UCS'] = $aP1['UCS'];

				$vZ = substr($vZ, 0, -12);
			}

			$aI['N'] = substr($vZ, 26, $nF);

			if(substr($aI['N'], -1) == '/') {
				continue;
			}

			$aI['P'] = dirname($aI['N']);
			$aI['P'] = $aI['P'] == '.' ? '' : $aI['P'];
			$aI['N'] = basename($aI['N']);

			$vZ = substr($vZ, 26 + $nF);

			if(strlen($vZ) != $aP['CS']) {
			  $aI['E']  = 1;
			  $aI['EM'] = 'Compressed size is not equal with the value in header information.';
			} else {
				if($bE) {
					$aI['E']  = 5;
					$aI['EM'] = 'File is encrypted, which is not supported from this class.';
				} else {
					switch($aP['CM']) {
						case 0:
							break;

						case 8:
							$vZ = gzinflate($vZ);
							break;

						case 12:
							if(! extension_loaded('bz2')) {
								if(strtoupper(substr(PHP_OS, 0, 3)) == 'WIN') {
								  @dl('php_bz2.dll');
								} else {
								  @dl('bz2.so');
								}
							}

							if(extension_loaded('bz2')) {
								$vZ = bzdecompress($vZ);
							} else {
								$aI['E']  = 7;
								$aI['EM'] = "PHP BZIP2 extension not available.";
							}

							break;

						default:
						  $aI['E']  = 6;
						  $aI['EM'] = "De-/Compression method {$aP['CM']} is not supported.";
					}

					if(! $aI['E']) {
						if($vZ === FALSE) {
							$aI['E']  = 2;
							$aI['EM'] = 'Decompression of data failed.';
						} else {
							if(strlen($vZ) != $aP['UCS']) {
								$aI['E']  = 3;
								$aI['EM'] = 'Uncompressed size is not equal with the value in header information.';
							} else {
								if(crc32($vZ) != $aP['CRC']) {
									$aI['E']  = 4;
									$aI['EM'] = 'CRC32 checksum is not equal with the value in header information.';
								}
							}
						}
					}
				}
			}

			$aI['D'] = $vZ;

			$aI['T'] = mktime(($aP['FT']  & 0xf800) >> 11,
							  ($aP['FT']  & 0x07e0) >>  5,
							  ($aP['FT']  & 0x001f) <<  1,
							  ($aP['FD']  & 0x01e0) >>  5,
							  ($aP['FD']  & 0x001f),
							  (($aP['FD'] & 0xfe00) >>  9) + 1980);

			$this->Entries[] = array(
				'Data' => $aI['D'],
				'Error' => $aI['E'],
				'ErrorMsg' => $aI['EM'],
				'Name' => $aI['N'],
				'Path' => $aI['P'],
				'Time' => $aI['T']
			);
		}

		return $this->Entries;
	}
}
